Mixing device for internal-combustion engines



1,622,701 vF. A. BREWER MIXING DEVICE FOR INTERNAL COMBUSTON ENGINES Marel. '29, 1927.

Filed Jan. s, 1925 W/T/vcss so `vice wit la horizontally extending mixing nected b yPatented Mar. ,29, 1927.

UNITED STATES PATENT ogEFlcE.

FRANCIS A. BREWER, 0I' EASTWOOD, NEW YORK.

MIXING DEVICE FOR'INTERNAL-COMBUSTION ENGINES.

Application nled January 3, 1925. Serial No. 399.

This invention relates to a device controlled by the suction in the intake manifold for introducing andmixing ext-ra air and moisture with the fuel in transit from the I carburetor to the combustion chambers of the cylinders of an internal combustion engine and refers more particularly to the means for controlling the mixture of airI and moisture in transit from the water l0 jacket of the engine to the intake manifold,

2.0 quantities of air and moisture into a. suitable' mixin chamber, and thence into the intake manlfold to mingle with the fuel in y, transit to the combustion chambers of the 'cylinder forI the purpose of reducing to a minimum the collection of carbon and for removing such carbon as may be collected upon the pistons, or interior of the cylinders, and in and around the poppet valves usually employed in engines of this character.

The s ecific object is to provide thedechamber with a restricted air inlet in constantly open communication with the atmosphere and to also provide the opposite ends of the mixing chamber with horizontally alined ports, one of which' communicates with a source of moisture supply, such as the water jacket of the engine, while the other is connected to the intake manifold between M7 the throttle f the carburetor and valve ports of the enginewhereby the-suction from the. engine serves to draw the mixture of air` and moisture from the mixing chamber into the fuel intake manifold for additionally sup- 5 orting the combustion of the fuel and reucing the carbon content of the products combustion.

Another specific object is to control the mixture by a single valve extending horizontally through the mixingchamber in axial alignment with the opposed ports and normally with one endcontrolling the inlet port and the other end extending toward the mixture outletport so as to be readil responsive to varying suctionpressures 1n the intake manifol A further object is to reduce the size of the portion of the mixing chamber between th'e air inlet and mixture outlet so as to form with the adjacent portion of the valve extendlng therethrough a restricted passage vfor said mixture in transit to the outlet andl thereby and air to control the amount of moisture assing to the outlet by a single needle va ve acting automatically under they varying degrees of suction in the intake manifold,

Other objects and uses relating to specific parts of the device will be brought out in the following description.

.In the'dra'wlings:

Figure 1 is a perspective view of a por- A tion 'of an internal combustion and my improved mixing device operatively connected thereto. Y

.Figure 2 is an enlarged, longitudinal, vertical sectional view of the sameA device detached from the engine, parts of the connections between said device and the water-jacket and manifold being broken away. v

As illustrated. this device comprises a valve case -1 secured by a clamp -2- to the upper surface of an exhaust manifold -afso as to extend upwardlyl and rearwardly in a substantially horizontal plane.

This valve case is provided with a mixing chamber -3- and opposite end ports -4- and -5' atto posite ends of the mixing. chambergwhicli, i"' turn, is provided with a restricted air inlet The e'nd of the mixing chamber adjacent the lport -4-'- is relatively large as compared with the oppositev end which is reduced in diameter to form a guide opening -7- for receiving and guiding a horizontalv longitudinally movable v alve .-8- which is co-axial with and between the ports -4-`- and 5 and has one end tapered at 8- to control the port -4-. v

This valve-El-l extends from the port -4- through the larger portion of the mixing chamber v-3- and into the smaller end thereof` which smaller portion is of only slightly greater diameter than the diameter of the Valve So as to form a restricted passage -9--l between and around the valve lengthwise Eof the reduced portion -7- and extending from the larger portion of, the mixing chamber -3- to the port -5-.

l v The port 4- is connected by a restrictder -13- at the junction of the larger portion with the smaller portion of the mix mg chamber and its other end engaged with a shoulder 14 on the valve.

The restricted port f5- is connected by a pipe '-15-.l to the fuel intake manifold -aof the engine -A- between the valve ports of the engine so that the suction produced by the action of the engine pistons will operatethrough the pipe -15- and port 5 to create similar suction in the reduced end of themixing'chamber 3 for opening the valve -8- in the direction of the mixture outlet port -5-.

The end of the valve adjacent the port -5- is provided with a diametrically extending slot -'16 to prevent any possibility of closing the port -5- by said valve in case it shouldbe-drawn against the adjacent end of the port.

A needle valve -17- is' adapted tobe set at will to vary the amount of moisture passi'ng through the restricting passage-l0- but is always open more or less and held in its open position by 'a lock nut'-18'..

The arrangement of the valve -8- and relation and in a. horizontall position is of considerableadvantage in that the moisture -fioats in a, direct path along the exhaust.

' it to have a more or less iioatifng movement in its restricted guide passage -9- and therefore causes it to .respond more' quickly and easily tothe sli htest variationl-ii the degree of suction in t e intake m l Another advantage of this c: )tial-. arrangement of the valve -8- am;

-4- and -5- is that the valve opens in the direction of movement of `the mixture as produced by the suction of the engine.

Operation.

Assuming that the pipes -ll-l and 415- are connected in the manner described to the upper portion of the waterjacket and intake manifold of the engine and that the air inlet 6- is open to the atmosphere then as the engine is operated the suction produced by the pistons in the mixing chamber -3- tends to draw the atmospheric air through the restricting passage -6- into said mixing chamber vand simultaneously to open the valve -8- and to draw moisture from the water-jacket through the pipe 1land ports l0-.- and -4- into said mixing chamber to mix with the air so that the mixture may be drawn through the outlet -5- and thence into the poppet valve chambers and combustion chambers of the engine through the intake manifold -afor additionally sup'- porting combustion and preventing the yformation of carbon in the engine cylinders.

It is, of course, understood that the r0- stricted air passage f6- and also the restricted guide passage -9- for the valve 8- are s proportioned that the slightest degree of uction in the mixin .chamber causes a corresponding opening o thevalve and that the amount of opening of said valve will depend upon the degree of suction.

. What I claim is:

internal combustion engines, com rising a horizont-ally extending valve-case aving a lengthwise mixing chamber provided with `coaxial end ports and Van intermediate restricted air inlet constantly open to the atmosphere, means for connecting one of said ports to a source of moisture supply, means for connecting the other port to the fuel intake manifold of the engine for producing suction -in the mixin chamber a valve extending lengthwise o and within the 'mixing chamber co-axial with said ports and controlling the moisture 'inlet port in- 1. A moisture and air mixing4 device for dependently ofthe suction port and air inlet,

said valve being adapted to be opened by suction. toward the suction port, and a spring for closing said valve whenthle suction ceases.

2. A moisture and air mixing devicefor internal combustion engines, comprising a horizontally extending Valve-case having a lengthwise mixing chamber provided with co-axial end ports and an intermediate refstricted air inlet constantly open to the atmosphere, means for connecting one of vsaid ports to a source of moisture supply, means for connecting the other port to the fuel intake manifold of the engine forA pro-- ducing suction in the mixin chamber, a valve extending lengthwise o the mixing chamber c-o-axial with said ports and controlling the moisture inlet port independently of the suction port andv air inlet, said valve being adapted to be opened by suction toward the suction. port, and a spring for closing said valve when the eucand withintion ceases, thejend of the valve nearest the lsuction port being provided'with a trans` l0 verse slot to prevent closingof the suction port in ycase the valvelshnpuld be drawn against the same.

In, witness whereof I have hereunto set my hand this v20th da of December, :1924.4

y FRAN IS A. BREWER. 

